It was a while back, about 15 years I guess? I threw out all of mine also. I wish I would have kept them now.
I ordered the 5.25 to 3.5 adapter, then I'm going to see how that mounts first, then I'll take a look at the 3.5 to 2.5 adapters. I bought a heatsink which I'm going to mount directly on top of the drive, that little sucker gets so hot!
-Pat